Study the graph and the table carefully and answer the following questions

What will come in place of question mark (?) in the following number series: 841, 961, 1089, 1225, 1369, 1521, (?)

Find the relation between x and y based on the given equations i) x2 − 4x − 117 = 0 ii) y2 − 3y − 154 = 0